SSL-LX509F3USBD Equivalent & Substitute Parts

Part Overview

The SSL-LX509F3USBD is an active blue LED indicator manufactured by Lumex Opto/Components Inc., designed for through-hole applications in discrete indication circuits. This T-1 3/4 (5mm) diffused lens LED operates at a forward voltage of 3.6V with a test current of 20mA and delivers 300 millicandela of luminous intensity. The component is ROHS3 compliant and maintains unlimited moisture sensitivity rating (MSL 1), making it suitable for standard industrial and consumer electronics applications. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement without circuit redesign or performance degradation.

Substiute Parts

SSL-LX509F3USBD

Lumex Opto/Components Inc.In Stock: 719SSL-LX509F3USBD Datasheet

Current PartRFQ

SSL-LX5093USBD

Lumex Opto/Components Inc.In Stock: 27036SSL-LX5093USBD Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SSL-LX509F3USBD are identified based on strict equivalence across the following critical parameters:

Optical Parameters: Lens size (5mm T-1 3/4), lens color (blue), lens transparency (diffused), millicandela rating (300mcd), peak wavelength (470nm), and viewing angle (60°) must remain constant.

Mechanical Parameters: Mounting type (through hole), package configuration (radial), and maximum height (8.60mm) must be identical to ensure physical compatibility with existing PCB layouts and mechanical assemblies.

Electrical Parameters: Forward voltage (Vf) and test current must fall within acceptable tolerance ranges for the application circuit. Minor variations in forward voltage (within 0.1V) are permissible when the substitute part maintains the same test current specification and optical output.

Compliance Parameters: RoHS3 compliance and MSL 1 rating must be maintained to ensure regulatory and environmental compatibility.

The SSL-LX5093USBD qualifies as a parametric equivalent based on these criteria, with a forward voltage of 3.5V (0.1V variance from the main part) while maintaining all other specifications.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The SSL-LX509F3USBD remains the primary choice when available, as it is the specified component with established circuit validation and 675 units in current inventory.

Substitute Selection: The SSL-LX5093USBD is a valid substitute when SSL-LX509F3USBD availability is constrained. The 0.1V forward voltage differential (3.5V vs. 3.6V) is within acceptable tolerance for standard LED indicator circuits and does not require circuit modification. Both parts maintain identical optical output (300mcd at 470nm peak wavelength), mechanical dimensions, and compliance certifications.

Compliance Assurance: Both parts are ROHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity ratings, ensuring regulatory compatibility and environmental stability across standard storage and operational conditions.

Inventory Consideration: The SSL-LX5093USBD maintains significantly higher inventory availability (26,987 units) compared to the main part, supporting supply chain continuity for high-volume production requirements.

Frequently Asked Questions (FAQ)

Q: Can SSL-LX5093USBD be used as a direct replacement for SSL-LX509F3USBD without circuit modification?

A: Yes. The SSL-LX5093USBD is a direct substitute with identical optical, mechanical, and compliance specifications. The 0.1V forward voltage difference (3.5V vs. 3.6V) does not require circuit redesign for standard LED indicator applications operating at 20mA test current.

Q: Are there any differences in optical performance between these parts?

A: No. Both parts deliver identical optical specifications: 300 millicandela intensity, 470nm peak wavelength, 60° viewing angle, and diffused blue lens appearance. Visual performance in end-user applications is equivalent.

Q: Do both parts fit the same PCB footprint and mechanical envelope?

A: Yes. Both parts are T-1 3/4 (5mm) through-hole radial packages with 8.60mm maximum height. They are mechanically interchangeable without PCB layout modification.

Q: What is the significance of the forward voltage difference?

A: The 0.1V difference (3.5V vs. 3.6V) is within standard LED manufacturing tolerance and does not affect circuit operation in typical indicator applications. Current-limiting resistor values remain unchanged.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both SSL-LX509F3USBD and SSL-LX5093USBD are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronics manufacturing.

Q: Which part should be selected for new designs?

A: For new designs, either part is acceptable. Selection should be based on availability, lead time, and inventory position. Both parts carry active product status and equivalent long-term supply reliability.